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152 lines
4.6 KiB
152 lines
4.6 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* lppaca.h |
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* Copyright (C) 2001 Mike Corrigan IBM Corporation |
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*/ |
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#ifndef _ASM_POWERPC_LPPACA_H |
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#define _ASM_POWERPC_LPPACA_H |
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/* |
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* The below VPHN macros are outside the __KERNEL__ check since these are |
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* used for compiling the vphn selftest in userspace |
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*/ |
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/* The H_HOME_NODE_ASSOCIATIVITY h_call returns 6 64-bit registers. */ |
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#define VPHN_REGISTER_COUNT 6 |
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/* |
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* 6 64-bit registers unpacked into up to 24 be32 associativity values. To |
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* form the complete property we have to add the length in the first cell. |
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*/ |
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#define VPHN_ASSOC_BUFSIZE (VPHN_REGISTER_COUNT*sizeof(u64)/sizeof(u16) + 1) |
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/* |
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* The H_HOME_NODE_ASSOCIATIVITY hcall takes two values for flags: |
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* 1 for retrieving associativity information for a guest cpu |
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* 2 for retrieving associativity information for a host/hypervisor cpu |
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*/ |
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#define VPHN_FLAG_VCPU 1 |
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#define VPHN_FLAG_PCPU 2 |
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#ifdef __KERNEL__ |
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/* |
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* These definitions relate to hypervisors that only exist when using |
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* a server type processor |
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*/ |
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#ifdef CONFIG_PPC_BOOK3S |
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/* |
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* This control block contains the data that is shared between the |
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* hypervisor and the OS. |
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*/ |
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#include <linux/cache.h> |
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#include <linux/threads.h> |
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#include <asm/types.h> |
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#include <asm/mmu.h> |
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#include <asm/firmware.h> |
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/* |
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* The lppaca is the "virtual processor area" registered with the hypervisor, |
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* H_REGISTER_VPA etc. |
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* |
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* According to PAPR, the structure is 640 bytes long, must be L1 cache line |
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* aligned, and must not cross a 4kB boundary. Its size field must be at |
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* least 640 bytes (but may be more). |
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* |
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* Pre-v4.14 KVM hypervisors reject the VPA if its size field is smaller than |
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* 1kB, so we dynamically allocate 1kB and advertise size as 1kB, but keep |
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* this structure as the canonical 640 byte size. |
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*/ |
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struct lppaca { |
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/* cacheline 1 contains read-only data */ |
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__be32 desc; /* Eye catcher 0xD397D781 */ |
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__be16 size; /* Size of this struct */ |
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u8 reserved1[3]; |
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u8 __old_status; /* Old status, including shared proc */ |
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u8 reserved3[14]; |
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volatile __be32 dyn_hw_node_id; /* Dynamic hardware node id */ |
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volatile __be32 dyn_hw_proc_id; /* Dynamic hardware proc id */ |
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u8 reserved4[56]; |
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volatile u8 vphn_assoc_counts[8]; /* Virtual processor home node */ |
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/* associativity change counters */ |
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u8 reserved5[32]; |
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/* cacheline 2 contains local read-write data */ |
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u8 reserved6[48]; |
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u8 cede_latency_hint; |
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u8 ebb_regs_in_use; |
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u8 reserved7[6]; |
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u8 dtl_enable_mask; /* Dispatch Trace Log mask */ |
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u8 donate_dedicated_cpu; /* Donate dedicated CPU cycles */ |
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u8 fpregs_in_use; |
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u8 pmcregs_in_use; |
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u8 reserved8[28]; |
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__be64 wait_state_cycles; /* Wait cycles for this proc */ |
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u8 reserved9[28]; |
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__be16 slb_count; /* # of SLBs to maintain */ |
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u8 idle; /* Indicate OS is idle */ |
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u8 vmxregs_in_use; |
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/* cacheline 3 is shared with other processors */ |
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/* |
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* This is the yield_count. An "odd" value (low bit on) means that |
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* the processor is yielded (either because of an OS yield or a |
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* hypervisor preempt). An even value implies that the processor is |
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* currently executing. |
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* NOTE: Even dedicated processor partitions can yield so this |
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* field cannot be used to determine if we are shared or dedicated. |
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*/ |
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volatile __be32 yield_count; |
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volatile __be32 dispersion_count; /* dispatch changed physical cpu */ |
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volatile __be64 cmo_faults; /* CMO page fault count */ |
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volatile __be64 cmo_fault_time; /* CMO page fault time */ |
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u8 reserved10[104]; |
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/* cacheline 4-5 */ |
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__be32 page_ins; /* CMO Hint - # page ins by OS */ |
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u8 reserved11[148]; |
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volatile __be64 dtl_idx; /* Dispatch Trace Log head index */ |
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u8 reserved12[96]; |
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} ____cacheline_aligned; |
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#define lppaca_of(cpu) (*paca_ptrs[cpu]->lppaca_ptr) |
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/* |
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* We are using a non architected field to determine if a partition is |
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* shared or dedicated. This currently works on both KVM and PHYP, but |
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* we will have to transition to something better. |
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*/ |
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#define LPPACA_OLD_SHARED_PROC 2 |
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static inline bool lppaca_shared_proc(struct lppaca *l) |
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{ |
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if (!firmware_has_feature(FW_FEATURE_SPLPAR)) |
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return false; |
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return !!(l->__old_status & LPPACA_OLD_SHARED_PROC); |
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} |
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/* |
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* SLB shadow buffer structure as defined in the PAPR. The save_area |
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* contains adjacent ESID and VSID pairs for each shadowed SLB. The |
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* ESID is stored in the lower 64bits, then the VSID. |
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*/ |
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struct slb_shadow { |
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__be32 persistent; /* Number of persistent SLBs */ |
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__be32 buffer_length; /* Total shadow buffer length */ |
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__be64 reserved; |
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struct { |
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__be64 esid; |
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__be64 vsid; |
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} save_area[SLB_NUM_BOLTED]; |
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} ____cacheline_aligned; |
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extern long hcall_vphn(unsigned long cpu, u64 flags, __be32 *associativity); |
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#endif /* CONFIG_PPC_BOOK3S */ |
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#endif /* __KERNEL__ */ |
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#endif /* _ASM_POWERPC_LPPACA_H */
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